sellers bancroft



Il /I J. s. BANGROPTQ Injector for Feeding Boi1ers.

Patented Feb 24, 1880.

' I Zzventor':

I UNITED STATES PATENT A OFFICE.

. J. SELLERS BANOROFT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WILLIAM SELLERS, OF SAME PLAoE.

INJECTOR F-OR FEEDING BOILERS.

SPECIFICATION forming part of Letters Patent No. 224,762, dated February 24, 1880.

Application filed December 2, 1879. i I

To all whom it may concern Be it known that I, J. SELLERs BANOROFT, of the city and county of Philadelphia, and State of Pennsylvania, have invented certain new and useful Improvements in Injectors for Feeding Boilers; and I hereby declare the fol 1 lowing to be a full and exact description thereof, reference bcinghad to the accompanying drawings, which form part of this specifica;

IO tion.

An object of my invention is to arrange the injector so that the combining and delivery tubes may be readily removed for the purpose of cleaning or repairs without disturbing the I 5 attachment of the injector to the pipes.

A further object of my invention is to arrange the check and stop valve on the overflow so that it may be kept in a perpendicular j position, while the injector may be put in any position, with the pipe-connection in a vertical plane.

A further object of my improvement is to provide a means of changing the position of the check-valve from one side of the injector to the other, so that the injector may be used as a right or left hand instrument.

When thefeed-water supplied to the injector is liable to deposit scale in the combining or delivery tubes, or when pieces of wood or 0 other material too large to pass through the tubes are carried in by the water, it is frequently necessary to remove these parts for cleaning.

In most injectors, as heretofore constructed,

3 5 it has been necessary to remove them from the pipes to getatthesetubes; or where the injector is arranged so that itis possible to remove the tubes without disturbing the pipe-connection, it will be found that the methods adopted for preventing the water from leaking into the overflow-chamber after it has passed through the delivery-tube are. not reliable, from inherent defects of construction, owing to the unequal expansion of the different parts of the 5 injector while it is at work; and my improvement consists in holding the combining and delivery tubes loosely in their places by a cap at the end of the injector, and in providing the delivery-tubewith a collar or valve which fits against a seat in the body of the injector,

and is packed tight by the water-pressure when the injector is at work.

Overflow check-valves, as heretofore cous'tructed, have been rigidly secured to the case of the injector, so that in placing the injector it is necessary to attach it so that the checkvalve may be vertical. This is frequently very inconvenient, on account of the position of the feed-pipes. In some few cases the checkvalve has been made so that its position could be changed; but the changes require skilled labor to make them or are limited to two positions; and my improvement consists in providing the check-valve with a perforated inlet-pipe, which passes through the body of 6 the injector, having on one end a valve-face which fits against a valve-seat on the side of the injector and having on the other end a screw-thread carrying a clamping-nut which A fits against a similar valve-seat on the other side of theinjector.

In the annexed drawings, which form part of this specification, Figure I is a sectional view on a vertical plane through the center of the instrument. Fig. II is a cross-section through the overflow check-valve, on the line :10 m. Fig. III shows a different method of attachin g the overflow-check.

Similar letters refer to similar parts.

A is the main casing or shell of the injector. B is the steam-nozzle, fitted into a suitablyformedrecess in the end of thecasing A, and heldin place by the coupling for the steampipe. G is the combining-tube, which fits by its upper end, a, in a hearing, I), carried in by a partition, 0, from the casing A. The lower end of the combining-tube O is secured to the end 01 of the delivery-tube D. The tube D has a collar or valve, 6, which centers the tube and holds it in position, and at the same time forms a valve seating against a partition, f, projecting from the walls of the casing A. The overflow-chamber is contained between the two partitions c and f.

The lower end of the delivery-tube D has a 9 5 flange, g, with openings 8 through it, which'fits in the retaining-cap E. This cap E fits and is secured tightly against the end of the easing A, forming a tight joint to prevent the escape of water from this end of the casing. There is a small space left between the inner end of the cap E and the projections h on the flange g of the delivery-tube, so that the expansion of the delivery-tube when at work shall not force the cap E from its seat, and so cause a leak, while the valve 0 is held so near its seat that as soon as the injector is started the water-pressure in the deliverychamber F- will hold the valve firmly to its seat, and so prevent any escape of water into the overflow-chamber; and as the combiningtube (3 is secured to the'delivery-tube, it is also held in proper position with reference to the steam-nozzle. To remove these tubes for ex amination or repairs it is only necessary to remove the cap E, when the delivery and combining tubes can be readily drawn out, and thus the whole interior of the injector can be cleaned without removingit from the pipes.

The check-valve body Gr is provided with an inlet-pipe, H, which passes through the casing A of the injector, and fits, by its ends R, in bearings in the casing A. The outer ends of these hearings are faced off so as to form valve-seats for the shoulder or valve l and nut N on the inlet-pipe.

It will be evident that by releasing the nut N the pipe H, and with it the checkvalve, may be rotated into any position with reference to the injector, and by removing the nut N the check-valve may be put on the other side of the instrument, as both bearings are alike, and the clamping-nut N will again secure the overflow check-valve in any desired position.

I do not limit my invention to the particular arrangement of pipe shown in Fig. II, for the pipe H may be shortened, as shown in Fig. III, and the forked rod R form the continuation to receive the clamping-nut N, the perforations or water-inlets being in the end of the pipe H.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an injector, the combination of a combining-tube, a delivery-tube, and a retainingcap, the delivery-tube being provided with a valve, 6, adapted to be seated upon the partition f, as and for the purpose set forth.

2. In combination with the overflow-valve of an injector, the valve-casing provided with a perforated pipe, H, and a clamping-nut, N the parts so constructed and arranged that the check-valve may be rotated and changed from one side of theinjeotor to the other, as and for the purposes specified.

J. SELLERS BANOROFT.

Witnesses:

J1vo. H. SoHWAoKE, DANL. B. ELY. 

